One symptom that is very evident as I am driving the car again today...the vibration is only apparent when the car is in gear (it is an auto) and at a stop. Once I put it in Drive or Neutral, it really has little to no vibration. But stick it into gear, while pushing the brake and car is at a standstill, and the VIBES start! Once you pull away and start driving, things are fine again. Could this mean that the vibration issue is more related to transmission, or does it just mean that the load created by the tranny is causing the engine to shake more, so the core problem is still engine?